Some interpretation for a noob

  • Resolved sasocreative

    (@sasocreative)


    10 years, 3 months ago

    Hi John,

    I’ve just installed Query Monitor to try to hunt down problems with his site load and its constantly throwing 500 errors. He’s on shared hosting, and php.ini is set to 256MB.

    When logged into Admin and on the Dashboard page (for instance), your plugin shows figures of 100+ MB memory. In layman’s terms, does that mean that every logged-in user is using 100MB of memory, and thus 3 logged-in users would overrun the allocated php.ini limit (3 x 100MB).

    I know that’s a really basic question, but I am trying to get my head around what the figures are telling me exactly and what to do about it. There are 19 plugins running, but these all go to specific functionality that the client requested. (Most are paid/premium plugins, and I have researched them thoroughly to make sure they’re the best of their type. But I’m not a coder, so interpreting what specifically is consuming memory is hieroglyphs.)

    Thanks

    https://wordpress.org/plugins/query-monitor/

Viewing 2 replies - 1 through 2 (of 2 total)
  • Plugin Author John Blackbourn

    (@johnbillion)

    WordPress Core Developer

    10 years, 3 months ago

    The memory limit only applies to the current request, which means each page load can use up to 256MB regardless of how many users are on the site (as far as PHP is concerned, anyway).

    That said, 100+MB is a very high amount of memory usage for an individual page. Although it’s entirely dependent on what your site is doing, even 50MB is a considerable amount of memory to use.

    The standard suggestion here is to deactivate your plugins individually and see if there is one particular plugin that’s using a lot of memory, or use a plugin such as P3 Profiler which can automate this for you.

    Thread Starter sasocreative

    (@sasocreative)

    10 years, 3 months ago

    Thanks for getting back to me, John. Very much appreciated. I have been down the switch-off-plugins path, but admittedly that was before I had installed Query Monitor, and I was trying to gauge performance by ‘feel’. Hopefully QM can give me some numbers/data to help me pinpoint the problem.

    Again, many thanks for replying so promptly, and for making and maintaining a very useful plugin.

Viewing 2 replies - 1 through 2 (of 2 total)

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